For some reason, my menu items are showing tooltips on hover-over- In other words, the menu links have "title" attributes being added to them. Looking at my other, older WordPress sites, this is not the case. I can't remember having this issue before- Why would this be happening?

I fixed this by adding a explicitly creating a menu vs relying on the default. Don't know why this would help (Figured it was an argument in wp_nav_menu_args but I couldn't find any dealing with this.)